Valve lifter



J. c. Roar-RTS March -15 1927,

VALVE LIFTER Filed June l, 1926 Patented Mar. 15, 1927.

UNITED lSTATES JOHN c. ROBERTS, on HARRISBURG, TEXAS.

-VALVE METER.

Application 4iled June 1,

This invention relates to new and useful improvements 1n a valve lifter.

One object of the lnvention 1s to provide a lifter of the characterdescribed specially designed to be used in internal combustion motorsand through which the valves of the motor may be actuated', or elevatedpractically noiselessly. f

Another object of the invention is to pro-l vide a two part valve lifterhaving a re silient lcushion interposed between them which will providethe properv clearance for expansion under heat and enable the respectiveends of the lifter to ride against the actuating cam at'one end and thevalve stem 4at the other, thus avoiding the usual tapping'- noiseincident to the usual valve operation of internal combustion motors.

With the above and other objects in view the invention has particularrelation to certain novel features of construction, operation andarrangement of parts, an example -of which is given in thisspecification and illustrated in the accompanying drawings, wherein j 4Figure 1 shows a fragmcntarv vertical sectional view of an internalcombustion motor showing the valve and-valve lifter mounted therein, and

Figure 2 shows a side elevation ofthe valve lifter.

Referring now more particularly to the drawings, wherein like numeralsdesignate similar parts in each of the figures the numeral 1 designatesa motor having cylinders, as 2, each provided with a valve .seat as 3,which is controlled bv the inwardly opening valve, as 4. Fastened to thevalve there is a stem 5v which works through-the bearing 6 and which'hasfixed thereon a collar 7,- interposed between which, and the bearing, 6there is a pressure spring 8 which surrounds said stem and whichnormally holds Ithe valve 4 closed.

The numeral 9 designates the valve lifter, 'as a whole, which is'aligned with the stem 5 and worksthrough the bearing 10. The numeral 11designates the cam shaft having the cam 12 fixed thereon, which ridesagainst one end of the valve lifter and actuates said lifter, the otherend of the lifter operating against the end of the valve stem 5." j

As now constructed and used the valve 1926. Serial No. 112,828.

lifter is rigid andy there mustbe a clearance left between the stem 5and -the adjacent .end of the lifter to allow for the expansion of theparts when they become hot. vWithout this clearance when the valve stem5l becomes hot and expands the valve would be held open. This clearancecauses the lifter to strike the opposing end of the va1ve5 as the lifteris actuated causingan objectionable tapping or noise which it is soughtto overcome. In order to accomplish thevdesired result I have formed thelifter of two main parts 13 and 14, the latter telescoping ywithin theformer, andbeing seated on a coil spring 15 interposed between them. The

inner end of the part 14 is enlarged forming an external annularshoulder 16 thereonl and a gland 17 i screwed into the part 13 with itsinner end rmosing said shoulder and this gland may be adjusted tolimitfvthe range ofV movement of the part 14 and is held in said'adjusted position by means of the lock nut 18. The outer end of thepart 14 is protected by the can 19 which is screwed thereon andwhichtakes the wea-r, and this cap is locked in position by 'means .of thelock nut 20. A

'In operationthe cam 12 operates against the adjacent-:end'of the part13 which is held'yieldingly thereagainst by the spring 15 and operatesto compress said spring and thereafter to also actuate the part 14against the valve stem to lift said valve. Inasmuch as the cap 19is inconstant contact with the opposing 'end of the valve stem 5 thisoperationwill be practically noiseless.

What I claim is f 1.l A valve lifter includinsur two relatively movableparts, ayvieldable member interv posed between said parts, one end ofthe lifter'being formed with an enlarged head,

a detachable wearing'-cap carried by the other end of the lifter and anfnljustable .gland carried bv the head.

2. A valve lifter includingv a female member` a male member adapted tomove longitudinallv relative thereto, a sprintf cushion upon which themale member rests, a gland screwed into said female member andlimitingthe movement of the male member and a. cap upon the free end ofthe malemember.

3. A valve lifter including a. female member, a male member telescopingwithin said female memberyia yieldabl seat, within the threaded on tosaid gland and @abutting the female member on which the male member isadjacent end of said female member and a seated, the outer end of themale member"detaehable can carried by the outer end of 10' being'reduced forming an annular shoulder, the male member. 5 aglandsurrounding said male member and In. testimony whereof I, have signed mythreaded into the female member and Whosev name to this speeiflcation.vinner end opposes said shoulder, a lock nut JOHN C. ROBERTS.

